Speaking after the G20 in Argentina, he said Khashoggi had not featured in the talks and only Canada’s Justin Trudeau had brought the subject up.

Saudi Arabia has charged 11 people with the murder, but there is no suggestion it is ready to send them to Turkey.

It denies that Crown Prince Mohammed bin Salman was involved in the killing.

The Saudi journalist was killed in the Saudi consulate in Istanbul in October.

President Donald Trump has also denied US media reports that the CIA believes such an operation would have needed the approval of Prince Mohammed, known as MBS.

What else did Erdogan say?

He added that the murder had been a test for the whole world, but insisted he did not want to damage the Saudi royal family.

He said solving the killing would be in the Saudi royal family’s interests.

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Media captionVladimir Putin and the Saudi crown prince high-five

The Turkish president said Turkey had evidence that Khashoggi had been killed over the course of seven and a half minutes and had shared the evidence with those countries who had asked for it.

What does Saudi Arabia say?

The Gulf kingdom’s public prosecutor has said Khashoggi was killed inside the consulate as a result of a “rogue operation” on the orders of an intelligence officer.

Khashoggi was given a lethal injection after a struggle. His body was then dismembered inside the consulate in Istanbul and the body parts were handed over to a local “collaborator” outside the grounds, the prosecutor said.

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How the story unfolded

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He said investigations had “revealed that the person who ordered the killing was the head of the negotiations team”, but did not identify any of the 11 people charged with the murder.

Who was Jamal Khashoggi?

As a prominent journalist, he covered major stories including the Soviet invasion of Afghanistan and the rise of Osama Bin Laden for various Saudi news organisations.

For decades he was close to the Saudi royal family and also served as an adviser to the government.

But he fell out of favour and went into self-imposed exile in the US last year. From there, he wrote a monthly column in the Washington Post in which he criticised the policies of Crown Prince Mohammed bin Salman.